dapdap Posted January 27, 2005 Report Share Posted January 27, 2005 Hello All Two days ago I got myself a Resun C0500 chiller for my 300 litre seahorse tank. It's very good (if a bit noisy!!!). but the instructions were completely in Chinese and there are a couple of issues I'm hoping you folks might be able to help me with. The first concerns 'Flow Rate'. The minimum recommended flow rate for this model (as far as I can make out!) is 2000 l/h. The pump I am using only generates 400 l/h. The machine is working perfectly fine. It has taken the temp down to 17C and maintains it there. But I'm a bit worried that I might be doing the machine some harm by running it a flow rate much less than recommended - Any thoughts? Also - I'd like to be able to turn it off for a couple of hours at night (so that we can watch telly without it blasting in the background!). Again I'm worried that switching it off and on every day might harm it? Anyone know if they need to run continuously or not? I asked the same questions of the petshop that sold it to me and they had no idea. Hope someone can help - It was too expensive to break!!! Quote Link to comment Share on other sites More sharing options...
chimera Posted January 27, 2005 Report Share Posted January 27, 2005 from what i've seen rates vary from 300l/hr to 2,000l/hr - sure thats not a maximum? 2,000 l/hr is alot. for a small tank, i would think it should be ok. read this: http://www.marinedepot.com/aquarium_chillers_heaters_teclima_information.asp?ast=&key= Quote Link to comment Share on other sites More sharing options...
dapdap Posted January 27, 2005 Author Report Share Posted January 27, 2005 Thanks for your reply Chimera. I am struggling to find information, but the following website has some stats: http://www.aquarium-supply.biz/ordering ... llers.html It states that the minimum flow rate is 500gph (which is about 2000 litres per hour) The chiller is much bigger than my tank needs, so the flow rate it is running on works okay. I'm just concerned that it might damage the chiller. I have read on one site that running the chiller at a rate lower than recommended could damage it. Quote Link to comment Share on other sites More sharing options...
jetskisteve Posted January 27, 2005 Report Share Posted January 27, 2005 I trickle water thru mine, Move it out of the lounge! Quote Link to comment Share on other sites More sharing options...
chimera Posted January 27, 2005 Report Share Posted January 27, 2005 as steve says above, his trickle's he runs an 802 powerhead (300l/hr i think?) alot of people run the return from their sump through the chiller then back into the main tank. Quote Link to comment Share on other sites More sharing options...
wasp Posted January 27, 2005 Report Share Posted January 27, 2005 I've got the Resun CL 280, run it on less tha 1/2 the recommended flow for the last two years, still working fine. I think the recommended flow rate is simply a function of getting thorough waterflow around the complete coil, and bringing a certain sized tank down at a certain rate. Noise, can be very clunky type noises. However I've spent a bit of time leveling up the feet, and now it is quiter than I ever thought possible. Quote Link to comment Share on other sites More sharing options...
RnB Posted January 27, 2005 Report Share Posted January 27, 2005 running 1060 return thro chiller.... Quote Link to comment Share on other sites More sharing options...
Drifty Posted January 28, 2005 Report Share Posted January 28, 2005 both my brother and I have the cl280. We both run a 500l pump with no probs. Mine is very quiet and his was very noisy(in the same house at the time so we could compare), he took his back and it was replaced as it was faulty Quote Link to comment Share on other sites More sharing options...
ben19185074 Posted January 28, 2005 Report Share Posted January 28, 2005 Co500 for a 300L tank~~abit too big. Your chiller may keep going on and off in a very short period... Quote Link to comment Share on other sites More sharing options...
dapdap Posted January 28, 2005 Author Report Share Posted January 28, 2005 Thanks for all the replies so far. It sounds like running the chiller at a reduced flow rate shouldn't do it any harm. That's very good to know! What about turning it off at night for an hour or two and back on again? I should think the temperature in the tank should only rise by about 2 -3 degrees, so it wouldn't take much for the chiller to bring it down again. So I can't see any reason why turning it off for short periods of time should do any harm - just thought I'd ask people with more experience I'd like to move it out of the room but it's not feasible You are right, Ben, about it turning off and on in short periods of time. The room temperature is about 25C and I'm bringing the temp down to 17C. At the moment it's coming on for 2 minutes, then stays off for 8 minutes. I think this is partially happening because of the low flow rate. The chiller is actually working 3 degrees below the real temp. It takes it down to 14 (real temp 17). Then activates again at 16 (real temp about 17.5). I think if I passed water through more quickly it would be able to work closer to the real tank temperature. But I REALLY don't want to see any more pipes, leads or equipment! How long do other user's chillers come on for and stay off for? Is anyone else trying to get their temperature down to 17C? Thanks again for your quick responses and help. Quote Link to comment Share on other sites More sharing options...
Duke Posted January 31, 2005 Report Share Posted January 31, 2005 I have purchased a CL650 which is over kill for my 4ft tank... I have an Eheim 1260 l/hr return pump from my sump which goes through a UV unit and then through the chiller which is situated next to the tank. The chiller runs about 5-10min each hour and the temp move about 2deg either side of the set point. Nosie.... well my wife calls it the "747" and like you it's a pain at night when watching the box. We are moving and building soon and I am looking at puting the thing in a box outside... pipes through the concrete. This will slow down the flow rate with longer hoses. Another post stated that leveling the feet helped so I am interested in this option but are not convinced it will help. Must say I like the tank at a stable temp 25deg not 30+ Let me know if you work out how to reduce the noice from 747 to fridge. Quote Link to comment Share on other sites More sharing options...
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